Carburetor



Feb. 19, 1929.

G. GRIFFON CARBURETOR Original Filed March 31, 1924 I INUENTIR Jwlffmb W M Patented Feb. 19, 1929.

GASTON GRIFFO'N, OF PARIS, FRANCE.

CARBURETOR.

Original application filed March 31, 1924, Serial No. 703,283, and in France April 7, 1923. Divided and this application filed September 2, 1925. 'Serial No. 54,117.

This invention has for its object an improvement in carburetors for the purpose of allowing them to supply, when the engine must run at full power, a rich explosive mixture and, in the other cases, the most economical mixture and is a division of my former application, Serial Number 703,283, filed March 31, 1924;.

The invention has, consequently, also for its purpose the reduction of the consumption of hydrocarbon and it consists in the application to carburetors of any type of an adjusting device so combined as to automati cally give:

(a) a rich mixture in case the engine runs at full power and (b) an economical mixture in all the other cases.

This improvement is characterized by the application of a valve controlled by the gas throttle or by the speed regulating member of the engine and so arranged as to control, Within the constant level tank, the effect of the partial vacuum created by the engine in the mixing chamber; this device is combined in such a manner that in case the throttle is completely open, this partial vacuum exerts a null or very small action within the said constant level tank and that, on the contrary, it exerts a positive action when the throttle is no longer in its open position.

In accordance with the present invention, the upper part of the constant level tank is in constant communication with the atmosand connected to the mixing chamber through a pipe which, presenting an orifice open to the atmosphere, is provided with the above mentioned valve and controlled bythe gas throttle, so as to control the opening and closing of this orifice for permitting, when the throttle is open an admission of air in the pipe putting the constant level tank in communication with the mixing chamber,

phere,

and to close this orifice when the throttle is in its closed position.

In the accompanying drawing Fig. 1 is an elevation partly in section of the improved carburetor. Fig. 2 is a detailed sectional viewtaken transversally through the axis of the throttle valve and in the plane of the port thereof.

In the form of construction illustrated in Fig. 1, the constant level tank 1 is in constant communication with the atmosphere at its upper part through an orifice 4 and is connected to the mixing chamber 6 by the ipe 5.

A supplementary air intake 4 is ormed on the shell 15 of a cock connected to the pipe 5 by a tube 17 and enclosing a key or plug 13 which, formed by one of the bulged ends of the axis of the throttle 9 accompanies the latter in its movement of rotation and is perforated with a port 14 arranged in such a manner that the pipe 5 is put in communication with the atmosphere when the throttle 9 occupies its fully open position illustrated in Figs. 1 and 2 and that this communication is closed as soon as the throttle no longer occupies this fully open position.

- Fuel from the tank 1 is supplied to the spraying nozzle 11 located in the'mixing chamber 6.

In these conditions, the partial vacuum created by the engine in the mixing chamber upon fully open position of the throttle 9 exerts, by the admission of air in the pipe 5, only a null or very small action in the constant level tank 1, whilst when this throttle is in its closed position, this partial vacuum on the contrary manifests itself in the constant level tank 1.

The above described arrangements are given by way of example only; the forms, materials and dimensions of the constitutent parts as well as the detail arrangements may be varied without departing thereby from the principle of the invention.

Claim A carburetor for explosion motors, comprising a constant level fuel chamber, a mixing chamber, means for putting the upper part ofthe constant-level fuel chamber in communication with the atmosphere, a duct connecting the upper part of the constantlevel fuel chamber with the mixing chamber and having an orifice adapted to permit communication of this duct with the atmosphere, a throttle valve, a valve forming a part of the throttle valve and adapted for controlling the opening and closing of the orifice in said duct during the movement of the throttle valve, said second mentioned valve 5 being so arranged that the said orifice is open when the throttle valve is open, and closed when the throttle valve is closed, said throttle valve having an enlarged trunnion havin a duct therein and constitutin said a v 1 second mentioned valve. 10

The foregoln speolfication of my improvement 111 car auretors slgned by me thls 29th day of July, 1925.

GASTON GRIFFON. 

